Question

运行我的应用程序后，我遇到了一个不可序列化的异常错误。

错误堆栈显示以下内容：

 SEVERE: IOException while loading persisted sessions: java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: br.dao.DriverManagerDAOFactory
java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: br.dao.DriverManagerDAOFactory
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1963)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1887)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1770)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1346)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:368)
    at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1496)
    at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:998)
    at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:394)
    at org.apache.catalina.session.StandardManager.load(StandardManager.java:321)
    at org.apache.catalina.session.StandardManager.start(StandardManager.java:648)
    at org.apache.catalina.core.ContainerBase.setManager(ContainerBase.java:446)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4631)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)
    at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:675)
    at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:601)
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
    at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317)
    at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065)
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
    at org.apache.catalina.core.StandardService.start(StandardService.java:525)
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:616)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: java.io.NotSerializableException: br.dao.DriverManagerDAOFactory
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1180)
    at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1528)
    at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1493)
    at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1416)
    at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1174)
    at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:346)
    at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1572)
    at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:1015)

所以我做了以下希望纠正这个问题：

class DriverManagerDAOFactory extends DAOFactory implements Serializable{
    private String url;
    private String username;
    private String password;

    DriverManagerDAOFactory(String url, String username, String password) {
        this.url = url;
        this.username = username;
        this.password = password;
    }

    Connection getConnection() throws SQLException {
        return DriverManager.getConnection(url, username, password);
    }
}

即使在我实现Serializable之后，错误仍然显示出来......任何有关此问题的线索？：/

Answer 1

您的超级班级DAOFactory是否可序列化？您的更改是否也正确地在课程路径中被选中？软件可能与早期的jar /类一起运行。

Answer 2

连接不应该也不能序列化。由于类似的原因，您的DAOFactory不可序列化。我想这个问题是因为你的工厂对象被引用/存储在你的会话中，因此当你的会话被序列化时，你的DAOFactory也会被序列化，导致异常。您应该仔细查看会话应该包含工厂对象的原因。

java.io.NotSerializableException错误

2 个答案: